Someone I am with has been bitten by a snake, what should I do?

The NHS say you should not do the following should this situation arise:

try to suck the venom out of the bite

try to cut the venom out of the bite or make it bleed

rub anything into the wound or apply ice, heat or chemicals

leave someone who's been bitten on their own

put anything around the bitten limb to stop the spread of venom (such as a tight pressure band, tourniquet or ligature) as it won't help, and can cause swelling or make it worse; it could also damage the limb, leading to the need for amputation